org.jfree.xml.util

Class ObjectFactoryLoader

java.lang.Object

org.jfree.xml.util.AbstractModelReader

org.jfree.xml.util.ObjectFactoryLoader

All Implemented Interfaces:

ObjectFactory

public class ObjectFactoryLoader
extends AbstractModelReader
implements ObjectFactory

The object factory loader loads the xml specification for the generic handlers. The specification may be distributed over multiple files.

This class provides the model management for the reader and writer. The instantiation of the handlers is done elsewhere.

Author:

TM

Constructor Summary

Constructors

Constructor and Description
ObjectFactoryLoader(URL resourceName) Creates a new object factory loader for the given base file.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	endMultiplexMapping() Finializes the multiplexer mapping.
protected void	endObjectDefinition() Finializes the object definition.
GenericObjectFactory	getFactoryForClass(Class c) Returns a factory instance for the given class.
ManualMappingDefinition	getManualMappingDefinition(Class c) Returns the manual mapping definition for the given class, or null, if not manual definition exists.
MultiplexMappingDefinition	getMultiplexDefinition(Class c) Returns the multiplex definition for the given class, or null, if no such definition exists.
protected void	handleAttributeDefinition(String name, String attribName, String handlerClass) Handles an attribute definition.
protected void	handleConstructorDefinition(String propertyName, String parameterClass) Handles a constructor definition.
protected void	handleElementDefinition(String name, String element) Handles an element definition.
protected void	handleLookupDefinition(String name, String lookupKey) Handles an lookup definition.
protected boolean	handleManualMapping(String className, String readHandler, String writeHandler) Handles a manual mapping definition.
protected void	handleMultiplexMapping(String typeName, String className) Defines an entry for the multiplex mapping.
boolean	isGenericHandler(Class c) Checks, whether the factory has a description for the given class.
protected void	startMultiplexMapping(String className, String typeAttr) Starts a multiplex mapping.
protected boolean	startObjectDefinition(String className, String register, boolean ignore) Starts a object definition.

Methods inherited from class org.jfree.xml.util.AbstractModelReader

endIncludeHandling, endRootDocument, getCloseComment, getCommentHandler, getOpenComment, handleIgnoredProperty, loadClass, parseXml, parseXmlDocument, setCloseComment, setOpenComment, startIncludeHandling, startRootDocument

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ObjectFactoryLoader

public ObjectFactoryLoader(URL resourceName)
                    throws ObjectDescriptionException

Creates a new object factory loader for the given base file.

Parameters:

resourceName - the URL of the initial specification file.

Throws:

ObjectDescriptionException - if the file could not be parsed.

Method Detail

startObjectDefinition

protected boolean startObjectDefinition(String className,
                            String register,
                            boolean ignore)
                                 throws ObjectDescriptionException

Starts a object definition. The object definition collects all properties of an bean-class and defines, which constructor should be used when creating the class.

Specified by:

startObjectDefinition in class AbstractModelReader

Parameters:

className - the class name of the defined object

register - the (optional) register name, to lookup and reference the object later.

ignore - ignore?

Returns:

true, if the definition was accepted, false otherwise.

Throws:

ObjectDescriptionException - if an unexpected error occured.

handleAttributeDefinition

protected void handleAttributeDefinition(String name,
                             String attribName,
                             String handlerClass)
                                  throws ObjectDescriptionException

Handles an attribute definition. This method gets called after the object definition was started. The method will be called for every defined attribute property.

Specified by:

handleAttributeDefinition in class AbstractModelReader

Parameters:

name - the name of the property

attribName - the xml-attribute name to use later.

handlerClass - the attribute handler class.

Throws:

ObjectDescriptionException - if an error occured.

handleElementDefinition

protected void handleElementDefinition(String name,
                           String element)
                                throws ObjectDescriptionException

Handles an element definition. This method gets called after the object definition was started. The method will be called for every defined element property. Element properties are used to describe complex objects.

Specified by:

handleElementDefinition in class AbstractModelReader

Parameters:

name - the name of the property

element - the xml-tag name for the child element.

Throws:

ObjectDescriptionException - if an error occurs.

handleLookupDefinition

protected void handleLookupDefinition(String name,
                          String lookupKey)
                               throws ObjectDescriptionException

Handles an lookup definition. This method gets called after the object definition was started. The method will be called for every defined lookup property. Lookup properties reference previously created object using the object's registry name.

Specified by:

handleLookupDefinition in class AbstractModelReader

Parameters:

name - the property name of the base object

lookupKey - the register key of the referenced object

Throws:

ObjectDescriptionException - if an error occured.

endObjectDefinition

protected void endObjectDefinition()
                            throws ObjectDescriptionException

Finializes the object definition.

Specified by:

endObjectDefinition in class AbstractModelReader

Throws:

ObjectDescriptionException - if an error occures.

handleConstructorDefinition

protected void handleConstructorDefinition(String propertyName,
                               String parameterClass)

Handles a constructor definition. Only one constructor can be defined for a certain object type. The constructor will be filled using the given properties.

Specified by:

handleConstructorDefinition in class AbstractModelReader

Parameters:

propertyName - the property name of the referenced local property

parameterClass - the parameter class for the parameter.

handleManualMapping

protected boolean handleManualMapping(String className,
                          String readHandler,
                          String writeHandler)
                               throws ObjectDescriptionException

Handles a manual mapping definition. The manual mapping maps specific read and write handlers to a given base class. Manual mappings always override any other definition.

Specified by:

handleManualMapping in class AbstractModelReader

Parameters:

className - the base class name

readHandler - the class name of the read handler

writeHandler - the class name of the write handler

Returns:

true, if the mapping was accepted, false otherwise.

Throws:

ObjectDescriptionException - if an unexpected error occured.

startMultiplexMapping

protected void startMultiplexMapping(String className,
                         String typeAttr)

Starts a multiplex mapping. Multiplex mappings are used to define polymorphic argument handlers. The mapper will collect all derived classes of the given base class and will select the corresponding mapping based on the given type attribute.

Specified by:

startMultiplexMapping in class AbstractModelReader

Parameters:

className - the base class name

typeAttr - the xml-attribute name containing the mapping key

handleMultiplexMapping

protected void handleMultiplexMapping(String typeName,
                          String className)
                               throws ObjectDescriptionException

Defines an entry for the multiplex mapping. The new entry will be activated when the base mappers type attribute contains this typename and will resolve to the handler for the given classname.

Specified by:

handleMultiplexMapping in class AbstractModelReader

Parameters:

typeName - the type value for this mapping.

className - the class name to which this mapping resolves.

Throws:

ObjectDescriptionException - if an error occurs.

endMultiplexMapping

protected void endMultiplexMapping()
                            throws ObjectDescriptionException

Finializes the multiplexer mapping.

Specified by:

endMultiplexMapping in class AbstractModelReader

Throws:

ObjectDescriptionException - if an error occurs.

isGenericHandler

public boolean isGenericHandler(Class c)

Checks, whether the factory has a description for the given class.

Specified by:

isGenericHandler in interface ObjectFactory

Parameters:

c - the class to be handled by the factory.

Returns:

true, if an description exists for the given class, false otherwise.

getFactoryForClass

public GenericObjectFactory getFactoryForClass(Class c)

Returns a factory instance for the given class. The factory is independent from all previously generated instances.

Specified by:

getFactoryForClass in interface ObjectFactory

Parameters:

c - the class

Returns:

the object factory.

getManualMappingDefinition

public ManualMappingDefinition getManualMappingDefinition(Class c)

Returns the manual mapping definition for the given class, or null, if not manual definition exists.

Specified by:

getManualMappingDefinition in interface ObjectFactory

Parameters:

c - the class for which to check the existence of the definition

Returns:

the manual mapping definition or null.

getMultiplexDefinition

public MultiplexMappingDefinition getMultiplexDefinition(Class c)

Returns the multiplex definition for the given class, or null, if no such definition exists.

Specified by:

getMultiplexDefinition in interface ObjectFactory

Parameters:

c - the class for which to check the existence of the multiplexer

Returns:

the multiplexer for the class, or null if no multiplexer exists.